Zip Code 78218 — San Antonio, TX
78218 is a ZIP Code associated with San Antonio, TX, located within Bexar. 78218 ranks #23 out of 70 ZIP codes in Bexar County by population (and #240 out of 1,990 in TX). The area supports an estimated population of 39,428 residents across Data Pending housing units, with a population density of 1,362.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (29.493540, -98.399480)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 78218 |
| Primary City | San Antonio |
| State / Province | TX |
| County | Bexar |
| Total Population | 39,428 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,362.1 people/sq mi |
| Timezone | America/Chicago |
How 78218 Compares
| Metric | ZIP 78218 | Bexar County | TX State Average |
|---|
| Population | 39,428 | 2,079,418 (Total) | 30,188,035 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,362.1 /sq mi | -- | -- |
| County Pop Rank | #23 of 70 | -- | -- |
Nearby ZIP Codes
| ZIP Code | City | Distance | Population | Median Income |
|---|
| Zip 78239 | San Antonio | 2.7 mi | 28,609 | N/A |
| Zip 78244 | San Antonio | 3.1 mi | 38,092 | N/A |
| Zip 78234 | Jbsa Ft Sam Houston | 3.2 mi | 7,149 | N/A |
| Zip 78209 | San Antonio | 3.5 mi | 43,400 | N/A |
| Zip 78217 | San Antonio | 3.5 mi | 34,055 | N/A |
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →